CN105859255A - 一种基于白云石的煤气发生炉用耐火砖 - Google Patents

一种基于白云石的煤气发生炉用耐火砖 Download PDF

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CN105859255A
CN105859255A CN201610307461.2A CN201610307461A CN105859255A CN 105859255 A CN105859255 A CN 105859255A CN 201610307461 A CN201610307461 A CN 201610307461A CN 105859255 A CN105859255 A CN 105859255A
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姚成立
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Zongyang Haili Machinery Manufacturing Co Ltd
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Abstract

本发明涉及煤气发生炉领域，具体的说是一种基于白云石的煤气发生炉用耐火砖，其配方组成为：白云石35％‑45％、铝矾土15％‑25％、黏土15％‑25％、木屑10％‑20％、板状刚玉5％‑10％、硅微粉1％‑6％、氧化铝微粉1％‑6％、红柱石1％‑4％、铝酸钙0.5％‑2％、添加剂1％‑5％、促凝剂0.5％‑2％；其制备过程包括以下步骤：(1)粉碎；(2)混料；(3)困料；(4)烧结；(5)保温；(6)成型；(7)养护。本发明的耐火砖制造简单，成本可控，耐高温性能优良，且由于本发明白云石的大量使用，以及白云石本身的固有特性，使得本发明耐火砖的耐火性较传统耐火砖更强。

Description

一种基于白云石的煤气发生炉用耐火砖
技术领域
本发明涉及煤气发生炉领域，具体的说是一种基于白云石的煤气发生炉用耐火砖。
背景技术
煤气发生炉是将煤炭转化为可燃性气体——煤气(主要成分为CO、H2、CH4等)的生产设备，部分煤气发生炉采用耐火砖堆砌而成。其工作原理为：将符合气化工艺指标的煤炭筛选后，由加煤机加入到煤气炉内，从炉底鼓入自产蒸汽与空气混合气体做为气化剂。煤炭在炉内经物理、化学反应，生成可燃性气体，上段煤气经过旋风除油器、电捕器过滤焦油.下段煤气经过旋风除尘器清除灰尘，经过混合后输送到用户使用。
耐火砖简称火砖。用耐火黏土或其他耐火原料烧制成的耐火材料。淡黄色或带褐色。能耐1580℃—1770℃的高温。也叫火砖。具有一定形状和尺寸的耐火材料。按制备工艺方法来划分可分为烧成砖、不烧砖、电熔砖(熔铸砖)、耐火隔热砖；按形状和尺寸可分为标准型砖、普通砖、特异型砖等。可用作建筑窑炉和各种热工设备的高温建筑材料和结构材料，并在高温下能经受各种物理化学变化和机械作用。例如耐火粘土砖、高铝砖、硅砖、镁砖等。
白云石为白色或带灰色块状或颗粒。相对密度3.32-3.35。熔点2572℃。沸点2850℃。
白云石晶体属三方晶系的碳酸盐矿物1。化学成分为CaMg(CO3)2。常有铁、锰等类质同象(代替镁)。当铁或锰原子数超过镁时，称为铁白云石或锰白云石。三方晶系，晶体呈菱面体，晶面常弯曲成马鞍状，聚片双晶常见。集合体通常呈粒状。纯者为白色；含铁时呈灰色；风化后呈褐色。玻璃光泽。是组成白云岩的主要矿物。海相沉积成因的白云岩常与菱铁矿层、石灰岩层成互层产出。在湖相沉积物中，白云石与石膏、硬石膏、石盐、钾石盐等共生。
发明内容
针对现有技术中的问题，本发明的主要目的在于，提升现有耐火砖的耐火质量，提高耐火砖使用寿命，从而使得耐火砖更具有产业上的利用价值。
本发明的目的及解决其技术问题是采用以下技术方案来实现的。依据本发明提出的一种基于白云石的煤气发生炉用耐火砖，其配方组成为：白云石35％-45％、铝矾土15％-25％、黏土15％-25％、木屑10％-20％、板状刚玉5％-10％、硅微粉1％-6％、氧化铝微粉1％-6％、红柱石1％-4％、铝酸钙0.5％-2％、添加剂1％-5％、促凝剂0.5％-2％；
优选的，其配方组成为：白云石40％、铝矾土15％、黏土15％、木屑15％、板状刚玉5％、硅微粉2％、氧化铝微粉2％、红柱石1％、铝酸钙0.5％、添加剂2％、促凝剂1.5％。
优选的，所述的添加剂为Cr2O3，所述的促凝剂为铝酸钠。
本发明所述的一种基于白云石的煤气发生炉用耐火砖，其制备过程包括以下步骤：
(1)粉碎：将上述配方中的成分按比例配置，采用对辊破碎机将上述配方中除红柱石和木屑之外的物质进行混合并粉碎，然后用球磨机磨成混合粉末并过筛，混合粉末细度为205目，木屑用雷蒙机磨细并过筛，木屑细度小于1mm，红柱石用对辊破碎机单独粉碎并进入球磨机磨粉粉末并过筛，红柱石粉末细度为86目；
(2)混料：采用二次搅拌工艺，将上述混合粉末、木屑和红柱石粉末一同放置在搅拌机内，第一次搅拌时间为2-3min，转速为80-120r/min，然后加入10％-12％的水使之混合成可塑状，第二次搅拌时间为4-5min，转速为150-210r/min；
(3)困料：困料在困料库中进行，困料时间为10h，困料设备采用可逆移动式布料器；
(4)烧结：烧成温度采用1400-1600℃；
(5)保温：保温时间为4-6h；
(6)成型：成型采用半硬塑双级真空挤出机，成型压力为10MPa，尺寸为240mm×115mm×90mm或者390mm×190mm×190mm；
(7)养护：在室温下养护48h。
优选的，烧成温度采用1450-1500℃，最佳温度为1500℃。
借由上述技术方案，本发明的耐火砖至少具有下列优点：
本发明的耐火砖制造简单，成本可控，耐高温性能优良，且由于本发明白云石的大量使用，以及白云石本身的固有特性，使得本发明耐火砖的熔点更高，耐火性较传统耐火砖更强。
具体实施方式
为了使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解，下面结合具体实施方式，进一步阐述本发明。
实施例1
本发明所述的一种基于白云石的煤气发生炉用耐火砖，其配方组成为：白云石40％、铝矾土15％、黏土15％、木屑15％、板状刚玉5％、硅微粉2％、氧化铝微粉2％、红柱石1％、铝酸钙0.5％、添加剂2％、促凝剂1.5％。
优选的，所述的添加剂为Cr2O3，所述的促凝剂为铝酸钠。
本发明所述的一种基于白云石的煤气发生炉用耐火砖，其制备过程包括以下步骤：
(1)粉碎：将上述配方中的成分按比例配置，采用对辊破碎机将上述配方中除红柱石和木屑之外的物质进行混合并粉碎，然后用球磨机磨成混合粉末并过筛，混合粉末细度为205目，木屑用雷蒙机磨细并过筛，木屑细度小于1mm，红柱石用对辊破碎机单独粉碎并进入球磨机磨粉粉末并过筛，红柱石粉末细度为86目；
(2)混料：采用二次搅拌工艺，将上述混合粉末、木屑和红柱石粉末一同放置在搅拌机内，第一次搅拌时间为2-3min，转速为80-120r/min，然后加入10％-12％的水使之混合成可塑状，第二次搅拌时间为4-5min，转速为150-210r/min；
(3)困料：困料在困料库中进行，困料时间为10h，困料设备采用可逆移动式布料器；
(4)烧结：烧成温度采用1400-1600℃；
(5)保温：保温时间为4-6h；
(6)成型：成型采用半硬塑双级真空挤出机，成型压力为10MPa，尺寸为240mm×115mm×90mm或者390mm×190mm×190mm；
(7)养护：在室温下养护48h。
优选的，烧成温度采用1450-1500℃，最佳温度为1500℃。
以上显示和描述了本发明的基本原理、主要特征和优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施方式和说明书中的描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入本发明要求保护的范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (5)

1.一种基于白云石的煤气发生炉用耐火砖，其特征在于：其配方组成为：白云石35％-45％、铝矾土15％-25％、黏土15％-25％、木屑10％-20％、板状刚玉5％-10％、硅微粉1％-6％、氧化铝微粉1％-6％、红柱石1％-4％、铝酸钙0.5％-2％、添加剂1％-5％、促凝剂0.5％-2％。
2.根据权利要求1所述的一种基于白云石的煤气发生炉用耐火砖，其特征在于：其配方组成为：白云石40％、铝矾土15％、黏土15％、木屑15％、板状刚玉5％、硅微粉2％、氧化铝微粉2％、红柱石1％、铝酸钙0.5％、添加剂2％、促凝剂1.5％。
3.根据权利要求1所述的一种基于白云石的煤气发生炉用耐火砖，其特征在于：所述的添加剂为Cr2O3，所述的促凝剂为铝酸钠。
4.根据权利要求1或2所述的一种基于白云石的煤气发生炉用耐火砖，其特征在于：制备过程包括以下步骤：
(1)粉碎：将上述配方中的成分按比例配置，采用对辊破碎机将上述配方中除红柱石和木屑之外的物质进行混合并粉碎，然后用球磨机磨成混合粉末并过筛，混合粉末细度为205目，木屑用雷蒙机磨细并过筛，木屑细度小于1mm，红柱石用对辊破碎机单独粉碎并进入球磨机磨粉粉末并过筛，红柱石粉末细度为86目；
(2)混料：采用二次搅拌工艺，将上述混合粉末、木屑和红柱石粉末一同放置在搅拌机内，第一次搅拌时间为2-3min，转速为80-120r/min，然后加入10％-12％的水使之混合成可塑状，第二次搅拌时间为4-5min，转速为150-210r/min；
(3)困料：困料在困料库中进行，困料时间为10h，困料设备采用可逆移动式布料器；
(4)烧结：烧成温度采用1400-1600℃；
(5)保温：保温时间为4-6h；
(6)成型：成型采用半硬塑双级真空挤出机，成型压力为10MPa，尺寸为240mm×115mm×90mm或者390mm×190mm×190mm；
(7)养护：在室温下养护48h。
5.根据权利要求4所述的一种基于白云石的煤气发生炉用耐火砖，其特征在于：烧成温度采用1450-1500℃，最佳温度为1500℃。
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Publication number Priority date Publication date Assignee Title
CN102992783A (zh) * 2011-09-14 2013-03-27 中钢集团耐火材料有限公司 瓶罐玻璃窑小炉燃烧室煤气通道部位用刚玉砖
CN104446568A (zh) * 2014-12-15 2015-03-25 山东鲁阳股份有限公司 一种耐火保温砖及其制备方法
CN104892011A (zh) * 2015-05-26 2015-09-09 柳州市亿廷贸易有限责任公司 白云石耐火砖的制备方法
CN105418090A (zh) * 2015-11-24 2016-03-23 怀宁县凉亭建材有限责任公司 白云石耐火砖的制备方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102992783A (zh) * 2011-09-14 2013-03-27 中钢集团耐火材料有限公司 瓶罐玻璃窑小炉燃烧室煤气通道部位用刚玉砖
CN104446568A (zh) * 2014-12-15 2015-03-25 山东鲁阳股份有限公司 一种耐火保温砖及其制备方法
CN104892011A (zh) * 2015-05-26 2015-09-09 柳州市亿廷贸易有限责任公司 白云石耐火砖的制备方法
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Application publication date: 20160817